## This Challengeable Spaceships are Can be Synthesised?

For discussion of specific patterns or specific families of patterns, both newly-discovered and well-known.

### This Challengeable Spaceships are Can be Synthesised?

According to recent discoveries, C/2 Orth, 2C/5 Orth, C/7 Orth, C/12 Diag (C/4 Diag is used to synthesis objects)
Spaceships are can be Synthesised like following two Examples.

Example1 : Synthesizable 2C/5 Spaceship
`x = 11, y = 19, rule = B3/S234b3o\$4bo2b3o\$4b5o\$7b2o\$2o\$obo\$ob2o3bo\$bo6bobo\$2b7obo2\$2b7obo\$bo6bobo\$ob2o3bo\$obo\$2o\$7b2o\$4b5o\$4bo2b3o\$4b3o!`

This 2C/5 Spaceship is look synthesizable.
As you know, The mirrored one have It's Synthesis Recipe.

Example2 : skomick's Synthesis Recipe of Loafer using 8 Gliders
`x = 34, y = 31, rule = B3/S23bo\$2bo\$3o2\$23bobo\$23b2o6bobo\$24bo6b2o\$32bo3\$27bobo\$27b2o\$7bo20bo\$7bobo\$7b2o2\$6bo\$4bobo\$bo3b2o\$b2o\$obo8\$26b3o\$26bo\$27bo!`

And this is a C/7 Orthogonal Spaceship discovered recently.
It's made up of 3 small parts. Loaf, Hat-like figure, and so on.
What's the Topic I saying is The C/3 Spaceships and others are can be Synthesised?
All of you thinks it 'Impossible', But I found Challengeable One.

`x = 9, y = 15, rule = LifeHistory7.D\$6.D.D\$5.D2.D\$6.D\$5.4D\$2.B.2D.D\$2B4.3D\$2B\$2B4.3D\$2.B.2D.D\$5.4D\$6.D\$5.D2.D\$6.D.D\$7.D!`

The Triangle like Spaceship is 'Dart', Blue part is not a problem. We just have to solve Mirrored Reddish Part.
If We finished to solve that Red, The 'Dart' Now Can be a Synthesizable Pattern.
Not only Orthogonal C/3 Spaceships but also Anothers can be Glider-Craftable.

P.S. I used a translate program to write this letters and Can't speak English so well...
So, Too many grammatical errors are can be exist.
Last edited by kiho park on December 13th, 2013, 8:48 pm, edited 2 times in total.
kiho park

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### Re: Can This Challengeable Spaceships are Synthesised?

Not everyone speaks English fluently. Please do not disparage anyone's writing on these forums.

-Sokwe
Princess of Science, Parcly Taxel

Freywa

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Location: Singapore

### Re: Can This Challengeable Spaceships are Synthesised?

The dart is indeed a good candiadte for a synthesis. Another fo me is the "weekender" because it's motor is easy to create (2 TLs)
This is game of life, this is game of life!
Loafin' ships eaten with a knife!
towerator

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Joined: September 2nd, 2013, 3:03 pm

### Re: Can This Challengeable Spaceships are Synthesised?

Freywa wrote:(comment removed)

While the grammar is definitely bad enough that it is very hard for native English speakers to understand, it's probably a good idea not to be too harsh about it as kiho park does not appear to be a native English speaker (the grammar is like if run through an automatic translator, so suggesting that probably won't help.) Remember, English grammar is very different from in Spanish, French, etc.
Sphenocorona

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### Re: This Challengeable Spaceships are Can be Synthesised?

I always hoped that this one (the ü-tag)could be synthesized:

`x = 14, y = 27, rule = B3/S238\$4b2obo\$b3o3bo\$bo\$bo6bo\$2b3o3bo\$5b2o3\$7b2o\$6b2ob3o\$7b5o\$8b3o!`

I had a near miss with building the engine from two colliding pis, but can't find that anymore! It looks so close to pi or b-heptomino development.
HartmutHolzwart

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Location: Germany

### Re: This Challengeable Spaceships are Can be Synthesised?

HartmutHolzwart wrote:I always hoped that this one (the ü-tag)could be synthesized: ...
I had a near miss with building the engine from two colliding pis, but can't find that anymore! It looks so close to pi or b-heptomino development.

I've tried to synthesize this one a few times, without any success (or even any near misses). It's one of the small c/2 tag-alongs that looks like it might possibly have some promise. I've seen some of the larger c/2 spaceships on pentadecathlon.com, that look like mutated LWSS/MWSS/HWSS engines that might also be possible, but others where there are two front sections, but no clear separation between the rear parts. Those would likely be very difficult to synthesize, at least using any conventional methods.
mniemiec

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### Re: This Challengeable Spaceships are Can be Synthesised?

I guess the synthesis difficulty is more movement-based than size-based: the more still-like parts a ship has, hte easier it is to synthetise it.
This is why the loafer was so easy: it is at the same time very small and quite still...
One of the smallest c/4 which has a "stable' part:
`x = 30, y = 15, rule = B3/S23\$12b2o4bo\$11bob2ob2ob2obo\$2bo2bo2bobo5b5o\$2bo2bobob2obobobob7o\$b2o19bobo2b2o\$2bob2ob9o10bo\$2bo\$2bob2ob9o10bo\$b2o19bobo2b2o\$2bo2bobob2obobobob7o\$2bo2bo2bobo5b5o\$11bob2ob2ob2obo\$12b2o4bo!`

sadly, it is kinda large, so I may be ambitious...
This is game of life, this is game of life!
Loafin' ships eaten with a knife!
towerator

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Joined: September 2nd, 2013, 3:03 pm

### Re: This Challengeable Spaceships are Can be Synthesised?

If one looks at existing syntheses of space ships, then there are actually two sources:

1) Those that can be synthesized from "common constellations", i.e. b-heptomino, pi or similar (most of the c/2 tags and *WSS variants)

2) Those that have a stable predecessor (i.e. the 2c/5 and the loafer).

How would you address the synthesis? Why should this one be especially promising?
HartmutHolzwart

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Location: Germany

### Re: This Challengeable Spaceships are Can be Synthesised?

HartmutHolzwart wrote:How would you address the synthesis? Why should this one be especially promising?

I've made a few attempts at synthesizing the Dart myself (so far, without success). It is like the 2c/5, in that the rear part closely resembles a de-stabilized still-life (which could hopefully be synthesized by starting with the still-life, then mangling it in place), and the front part is a honeyfarm predecessor, which is also easily synthesized.
mniemiec

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### Re: This Challengeable Spaceships are Can be Synthesised?

Now that the dart is finally synthezised, what is the next challenge/candidate?

I think I saw a large part of my ü tag in a collision of two pies.
HartmutHolzwart

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Joined: June 27th, 2009, 10:58 am
Location: Germany

### Re: This Challengeable Spaceships are Can be Synthesised?

Here is my collection of what looks not beyond the reach for synth:

`x = 123, y = 22, rule = B3/S237\$10bo11bo16bo11bo\$10bo11bo14b4o9b4o8b3o10b3o\$9bobo9bobo12b2o2bo9bo2b2o6bo3bo8bo3bo14b3o15b3o\$35bo2b4o3bo3b4o2bo36bo3bo13bo3bo\$8bo3bo7bo3bo10bo4b3obobob3o4bo9bo8bo16b2o4bo11bo4b2o\$8bob6ob6obo15bo3bobo3bo10bo7b2o7bo11bobob2ob2o3b3o3b2ob2obobo\$7bo7bobo7bo9b3o6bobo6b3o7b3o2bo2bo2b3o12b2obo4bob2ob3ob2obo4bob2o\$7bo7bobo7bo18bobo17b2ob2o2b2ob2o12bo4bo3bo4bobo4bo3bo4bo\$7bo17bo15b2obobob2o50bo5bo\$8bob2ob2o3b2ob2obo16b2obobob2o38b2o7b2o9b2o7b2o\$43b2ob2o18b8o\$43bo3bo19bob2obo\$44bobo\$43bo3bo!`

simsim314

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### Re: This Challengeable Spaceships are Can be Synthesised?

simsim314 wrote:Here is my collection of what looks not beyond the reach for synth...

Of this list, the p2 spaceship looks maybe less likely than the others. Might it be narrow enough that some kind of long line of sparks could attack a construction site from both sides? I don't know. It's pretty quick and active, so once it gets going it will be hard to keep up with, to make any final adjustments...!

Sokwe also mentioned the c/4 diagonal crab, which does seem like a likely target. Do we have a likely glider-turning reaction that can drop those gliders in in front of (a predecessor of) the crab tagalong?

`#C Crab -- Jason Summers, September 2000.#C The smallest known diagonal spaceship other than the glider. Period 4, speed c/4.x = 13, y = 12, rule = B3/S238b2o3b\$7b2o4b\$9bo3b\$11b2o\$10bo2b2\$9bo2bo\$b2o5b2o3b\$2o5bo5b\$2bo4bobo3b\$4b2o2bo4b\$4b2o!`

dvgrn
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### Re: This Challengeable Spaceships are Can be Synthesised?

dvgrn wrote:Do we have a likely glider-turning reaction that can drop those gliders in in front of (a predecessor of) the crab tagalong?

I don't think that this is a good approach. I guess it's better to synthesize this as a whole:

`x = 6, y = 5, rule = B3/S23b2o\$2o\$2bo\$4b2o\$4b2o!`

And then add the missing part in the middle.

Anyway here is one of the best in front placers:

`x = 53, y = 60, rule = B3/S239\$45bo\$43b2o\$44b2o21\$27bo\$26bobo\$27bobo\$28bo6\$26b2o\$25bobo\$24bobo\$25bo4b3o\$30bo\$31bo!`

And it's just not good enough...I guess there might be something better, but as a whole I don't think the in-front inserter is the best approach here.

simsim314

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### Re: This Challengeable Spaceships are Can be Synthesised?

simsim314 wrote:...here is one of the best in front placers:

`x = 53, y = 60, rule = B3/S239\$45bo\$43b2o\$44b2o21\$27bo\$26bobo\$27bobo\$28bo6\$26b2o\$25bobo\$24bobo\$25bo4b3o\$30bo\$31bo!`

And it's just not good enough...I guess there might be something better, but as a whole I don't think the in-front inserter is the best approach here.

Something better was posted by knightlife several years back:

`#C tumbler-mediated glider placement, T=11 through 14, H=0#C where H is horizontal lane offset, T=number of ticks advanced#C (Stop running after 20 ticks, since T=11-13 are too close at H=0)x = 102, y = 17, rule = B3/S2384bo\$o27bo24bobo29bo\$b2o23bobo25b2o27b3o\$2o25b2o25bo\$31bo25bo30bo\$3bobo26bo25b2o26bobo\$4b2o24b3o24b2o28b2o\$4bo2\$15b3o24b3o24b3o27b3o\$12b2o3bo21b2o3bo21b2o3bo24b2o3bo\$12b5o22b5o22b5o25b5o2\$12b5o22b5o22b5o25b5o\$7bobo2b2o3bo16bobo2b2o3bo16bobo2b2o3bo19bobo2b2o3bo\$8b2o5b3o17b2o5b3o17b2o5b3o20b2o5b3o\$8bo26bo26bo29bo!`

There must be equivalent reactions starting with still lifes, though they may be hard to find.

But that doesn't make it easy to synthesize the unstable block+glider combination, because the tumbler-to-glider produces gliders in the other phase, and the usual block recipes don't happen to produce a preblock with the missing bit in the right place. (I think).

No doubt there's an appropriate preblock recipe available, *WSS+G if nothing else, quite possibly even without any tumbler-type glider insertion trick... but is there room for the same block+glider construction reaction on both sides plus a recipe for the central spark? I'm a bit worried about that "add the missing part in the middle"...!

dvgrn
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### Re: This Challengeable Spaceships are Can be Synthesised?

dvgrn wrote:There must be equivalent reactions starting with still lifes, though they may be hard to find.

With my 4K reflectors (which I think is very partial anyway), there is only one interaction that supports 14 ticks in-front inseters (this includes 180 degree turners and lane switchers):

`x = 151, y = 41, rule = B3/S2323bo\$22bo\$22b3o12\$148bobo\$148b2o\$6b2o141bo\$5bobo2b2o\$5b2o3bobo\$3b2o5bo\$2bobo\$2b2o3\$b2o\$o2bo\$bobo\$2bo2\$132b2o\$131bobo2b2o\$131b2o3bobo\$129b2o5bo\$128bobo\$128b2o3\$127b2o\$126bo2bo\$127bobo\$128bo!`

I will post more results for 15 ticks and back inserters in the Splitters thread.

EDIT See here

simsim314

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